Investors looking for e-commerce exposure have two high-profile options: Amazon.com Inc. (NASDAQ:AMZN) and MercadoLibre Inc. (NASDAQ:MELI). Both have solid growth stories, but the question right now is which one gives you the better deal.Track AMZN stock here.The E-Commerce Giant’s Valuation AdvantageAmazon is trading at a P/E of 32.7 and EV/EBITDA of 16.2, both comfortably below the Magnificent Seven average of ~40 and ~25, respectively, according to Benzinga Pro data. MercadoLibre, in contrast, has a P/E ...